Hoa: Tokyo is one of the most crowded cities in the world. Linh: Really? ______ A. I’m very busy. B. I didn’t know that! C. That’s all right. D. No, thanks.Đoạn văn41/41Hoa: Tokyo is one of the most crowded cities in the world.Linh: Really? ______ I’m very busy. I didn’t know that! That’s all right. No, thanks.Giải thíchĐáp án đúng là B